Adjustable support stand for electric lamps



June 17, 1930. o. J. MOEHLER ADJUSTABLE SUPPORT STAND FOR ELECTRIC LAMPS 2 Sheets-Sheet 1 Filed Dec. 21

// IWENTdR HIS ATTORNEY June 17, 1930. o. J. MOEHLER ADJUSTABLE SUPPORT STAND FOR ELECTRIC LAMPS Filed Dec. 21, 1926 2 Sheets-Sheet 2 l INVENTOR IS ATTORNEY Patented June 17, 1930 i OTTO J. MOEHLER,

0E NEWARK, NEwJERsEY, YASSIGNOR To GENERAL ELECTRIC VAPOR COMPANY, A OORPORATION OF NEW JERSEY ,AnJ sTnBnE SUPPORT STAND ron ELECTEIo LAMPS Application filed December 21, 1926. Serial No. 156,243.

The present invention relates to a stand for a lamp or lamps and more particularly a stand which can be portable, which is adjustable as'to height and which is adapted for carrying a source oflight which is eX-,

tended particularly in one direction, and on which the source is adjustable angularly across the line of extension and also angularly in a vertical planealong the line of its shown for purposes of illustration one form of device embodying the invention, in which Fig. 1 is a vertical elevation view of an embodiment of the invention,

Fig. 2 is a vertical elevation view in part section showing details of a part of the apparatus of Fig. 1,

Fig. 3 is a part view in elevation and in part section taken along the line 33 of Fig. 2

and looking in the direction of the arrows,

Fig. 4 is'an elevation view in part section and in part broken away showing further details of support construction, and

Fig. 5 is an elevation'view taken at right angles to that of Fig. 1.

Fig. 6 is a detail View partly in section showing means of electrical connection and disconnection of a line extension.

In the drawings the base 1 which has the four rollers or casters 3 carry the vertical casing 4 mounted with its center off the center of the base and in which are mounted resistances, transformers, and the like used as auxiliary apparatus for mercury Vapor arc lamps such as are well known in the art. On its top said casing 4 carries the standard 5 in which is mounted the vertical support 6 in the form of a tube or pipe. Said pipe 6 has formed by sawcuts therein a lip 7 which holds a collar 8 on the upper end of the pipe by extending into the opening 9 in said collar '8. Said collar 8 has an annular shoulder 10 which rests'on the upper end of said pipe 6 and also has a boss 12 having an opening therethrough into which is threaded the set screw 14 which extends against the clamping lip 15 formed in pipe 6. Through said collar Sand into said pipe 6 'thereextends another pipe standard 18 which is adapted to be clamped at adjusted positions in said pipe 6 by means of said set screw 14 and said lip 15. When the pipe 18 is in the pipe 6 and the set screw 14 is tightened said lip 15 will be forced transversely against the side of the pipe 18 to clamp it in position.

Referring particularly to Figures '2 and 3 andalso Figure 1 said pipe-r18 carries a head 20 having a socket 22 into which theupper end of said pipe 18 fits. Said pipe 18 carries a collar 24 fixed thereabout in a position ust below the lower end of said head member 20 and a member 26 fixed to saidhead member 20 and extending past said'collar 24 and turned inwardly underneath the lower face thereof serves to hold said headmember 20 on said pipe 18 and yet permit rotational movement of said head onsaid pipe. In said head member: 20 is a chamber '28-through which. and through the slide channels 30 and 32 extends the rack member 34 the lower end of which extends intosaidpipe 18. Into the end ofsaid member34 is threaded the stud 36 about which is mounted the compressionspring 38.

Adength oftubing 40' mounted aboutsaid engaging the shoulder formed aboutsaid stud 36 at the'lower end of said member 34.

On said member 20 is provided a cover 46 for said chamber 28 which is held thereon byv the bolts 48. The openings 50 and 52 respectively through said cover 46 and the opposite wall of said head member 20 serve as bearings for the shaft 54 which carries the pinion 56 which is fixed thereto and which meshes with the teeth of said rack member 34. The teeth on said pinion do not extend completely around and a set screw 58 is used for fixing the pinion to the shaft. 7 A set of washers 60, 60 mounted about shaft 54 between cover 46 and pinion 56' serve through the adjustment ofsaid bolts48, 48 to apply a detaining pressure on the pinion, and thereby regulate the ease of movement of these parts. hand screw 62 which can betightened against said rack member 34 serves to fix the moving parts of a lamp carried thereby at desired positions. 7

Said shaft 54 through the arm 66 supports the longitudinalrefiector 64 which is mounted radially therefrom and which carries a mercury vapor arc lamp of the long tube type or .a plurality of sources of light mounted along the length thereof; In some cases said head member 20 has lamp and reflector unit mounted on each side thereof. And in some cases the auxiliary apparatus such as is in casing 4 is mounted on both sides of the vertical axis of said standard 5', The adjustable screws 70 and 72 extending through the flange 74 on said head 20 serve through contact with portions of said arm 66 on opposite sides of said shaft 54 to iii; the upward and downward limiting positions of movement of said reflector 64 with its lamp. When the lamp and refiector are moved radially on shaft 54 to ad just the position thereof said spring 38 eases the movement and said shims60 under pressure serve to compensate for, variations in the torque of the weight of saidlampf and refiector at different radial positions thereof. The position of the lamp and reflector is ad'- j ustablevertically by means of said standards 6 and18 and said set screw 14; is adjustable rotatably in a horizontal plane either on the casters 3, 3 of stand 1 or by the rotation of head 20-on said pipe 18; and is adjustable radially in a vertical plane on said shaft 54.

While I have shown and described and have point-ed out in the annexed claims certain novel features of the invention, it will be understood that various omissions, sub

stitutions and changes in the forms, parts and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. c

Claims: v 1. An adjustable support apparatus COIIlprising an upright tube, a head member swiveled on the upper end of said tube, said head member being providedwith a slideway connecting at all rotative positions with the opening of said tube, a'rack slidable in said slideway and in the tube opening, a sleeve in said tube and about said rack bearing against the lower side of said head member,

The

a compression springbearing at one endagainst the lower end of said sleeve and at its other end against a shoulder on said rack, said shoulder being adjustable on said rack for varying the compression of said spring, a load supporting shaft journalled in said head nember and a pinion onjsaid shaft and engaging said rack 2. An adjustable support apparatus comprising a base, an upright" tube sup orted" thereby, a head member swiveled on the upper end of said tube, said head member being provided with a-slid'e'way connecting at all rotative positions with the opening of said tube, a rack slidable in said slideway and in said tube opening, a sleeve insaid tube and about said rack bearing the lower side of said head member, a compres;

sionspring bearing at oneend againstthe lowerend of said sleeve and at its other end 

